Disposable diaper for pets

ABSTRACT

A disposable diaper for pets having a shortest straight line point being further on a stomach-side waist area side than a diaper center point, and comprising: a rear-side waist area; a stomach-side waist area; a crotch area; a flap section provided in the stomach-side waist area and having an end section in the rear-side direction; a diaper longitudinal direction center line; the diaper center point; a tail insertion opening; an absorbent core; an attachment section arranged in the flap section; an attachment section intermediate point; an attachment area that receives the attachment section; and the shortest straight line point being a point on the diaper longitudinal direction center line at the shortest direct distance, via a rear-side end section of the flap section in a straight line from the attachment section center point to the diaper longitudinal direction center line.

TECHNICAL FIELD

The present invention relates to a disposable diaper for pets, and moreparticularly to a disposable diaper for pets that fits well around thelegs of the pet.

BACKGROUND ART

It is common to keep pets, typically dogs and cats, indoors. Therefore,various kinds of disposable diapers for pets are available. For example,a disposable diaper for pets as disclosed in Japanese Unexamined PatentApplication Publication JP 2004-159591A is provided.

PRIOR ART DOCUMENT Patent Document

Patent Document 1:

JP 2004-159591A

SUMMARY OF THE INVENTION Problem to be Solved by the Invention

The disposable diaper for pets (disposable pet diaper) disclosed inJP2004-159591A is now described with reference to FIGS. 25 and 26. FIG.25 is a plan view showing the disposable pet diaper in its unfoldedstate, and FIG. 26 is an explanatory drawing for illustrating a state ofthe disposable pet diaper worn by a pet.

A disposable pet diaper 1000 includes a liquid-permeable sheet 9910, aliquid-resistant sheet (not shown) and an absorbent core 2000 disposedbetween the liquid-permeable sheet 9910 and the liquid-resistant sheet.

The liquid-permeable sheet 9910 is formed of liquid-permeable nonwovenfabric. The liquid-resistant sheet is formed of liquid-impermeableplastic film. The absorbent core 2000 is formed of a mixture of liquidabsorbent fibers such as pulp, and a super absorbent polymer.

The disposable pet diaper 1000 has an abdomen-side waist area 1110, aback-side waist area 1130 and a crotch area 1120 between theabdomen-side waist area 1110 and the back-side waist area 1130.

The disposable pet diaper 1000 has a diaper longitudinal direction inwhich the abdomen-side waist area 1110, the crotch area 1120 and theback-side waist area 1130 are contiguously formed, and a diapertransverse direction crossing the diaper longitudinal direction.

The abdomen-side waist area 1110 has an end 1110A and the back-sidewaist area 1130 has an end 1130A in the diaper longitudinal direction.

An abdomen-side flap 1150 is formed in the abdomen-side waist area 1110and has a back-side end 1150B. The back-side end 1150B is contiguouslyformed to extend from an end of the abdomen-side flap 1150 in the diapertransverse direction to a region of an end 2220 of the absorbent core2000 in the diaper transverse direction.

When the disposable pet diaper 1000 is put on a pet, a relatively longarea of the abdomen-side flap 1150 comes in contact with a leg α1 of thepet.

A fastening part 3000 having a plurality of hooks is provided on theabdomen-side flap 1150.

The absorbent core 2000 is disposed in a prescribed region extendingover the abdomen-side waist area 1110 and the crotch area 1120. A tailinsertion opening 1190 is formed in a prescribed position in the crotcharea 1120 and the back-side waist area 1130 where the absorbent core2000 is not provided.

A fastening region 9000 comprising a target tape is formed in aprescribed position of the back-side waist area 1130. In order to putthe disposable pet diaper 1000 on a pet, the hooks on the fastening part3000 are engaged with the fastening region 9000.

A back-side flap 1160 is formed in the back-side waist area 1130.

A leg stretchable elastic member 4000 is provided in the vicinity of anend of the disposable pet diaper 1000 in the diaper transversedirection. Leg gathers 4410 shown in FIG. 26 are formed by contractionof the leg stretchable elastic member 4000. The leg stretchable elasticmember 4000 is arranged to extend over part of the abdomen-side waistarea 1110 and the crotch area 1120. Therefore, the contraction force ofthe leg stretchable elastic member 4000 has no influence on the end1110A of the abdomen-side waist area 1110 and the end 1130A of theback-side waist area 1130.

A leakproof sheet 8000 is arranged to extend inward from the end in thediaper transverse direction of the disposable pet diaper 1000. Aleakproof sheet stretchable elastic member 6000 is provided in theleakproof sheet 8000. Leakproof gathers and a leakproof wall which arenot shown are formed by contraction of the leakproof sheet stretchableelastic member 6000.

An end of the leakproof sheet stretchable elastic member 6000 in theabdomen-side waist area does not extend up to the end 1110A of thedisposable pet diaper 1000 in the diaper longitudinal direction. Theback-side end of the leakproof sheet stretchable elastic member 6000 isarranged to extend beyond the tail insertion opening 1190.

In order to put the disposable pet diaper 1000 on a pet, the back-sidewaist area 1130 is placed on a back of the pet and the crotch area 1120and the abdomen-side waist area 1110 are placed on a crotch and anabdomen of the pet, and then the fastening part 3000 is fastened to thefastening region 9000.

At this time, as described above, the length with which the end 1150B ofthe abdomen-side flap 1150 comes in contact with a leg of the pet isrelatively long.

Therefore, the end 1150B may be turned up when the diaper is put on thepet. As a result, the pet may dislike wearing the disposable pet diaper1000, or excrement may leak out.

Accordingly, it is an object of the present invention to provide adisposable diaper for pets which fits well around the legs of the pet.

Means for Solving the Problem

According to the present invention, a disposable diaper for pets isprovided which includes a back-side waist area, an abdomen-side waistarea, and a crotch area between the back-side waist area and theabdomen-side waist area, a flap formed in the abdomen-side waist areaand having an end on the back side, a diaper longitudinal direction inwhich the back-side waist area, the crotch area and the abdomen-sidewaist area contiguously extend when the disposable diaper is not worn bya pet, and a diaper transverse direction crossing the diaperlongitudinal direction, both ends in the diaper longitudinal direction,and both ends in the diaper transverse direction, a diaper longitudinalcenter line extending in the diaper longitudinal direction and passingthrough a center of the disposable diaper in the diaper transversedirection, a diaper center point which bisects the diaper longitudinalcenter line on the disposable diaper, a tail insertion opening formed ina prescribed region in the diaper longitudinal direction, an absorbentcore formed on one side of the tail insertion opening in the diaperlongitudinal direction and disposed in a prescribed region extendingover the crotch area and the abdomen-side waist area, a fastening parthaving a prescribed length and provided on the flap, a fastening partlongitudinal direction in which the length of the fastening part extendsand a fastening part transverse direction crossing the fastening partlongitudinal direction, a fastening part midpoint which bisects a lengthof the fastening part in the fastening part transverse direction on aboundary between the fastening part and the flap, a fastening regionprovided in the back-side waist area and configured to receive thefastening part, and a shortest line point located on the diaperlongitudinal center line at a shortest straight-line distance from thefastening part midpoint to the diaper longitudinal center line via theback-side end of the flap.

Further, the shortest line point is located on an abdomen-side waistarea side beyond the diaper center point.

When the disposable diaper according to this invention is put on thepet, the crotch area and the abdomen-side waist area cover a crotch andan abdomen of the pet, while the back-side waist area is closely fittedto a back of the pet, and the fastening part is fastened to thefastening region.

Further, the weight of the absorbent core after excretion is received inthe longitudinal direction of the fastening part while the disposablediaper according to this invention is worn by the pet.

In a further aspect of the solution according to the present invention,a straight-line distance between the shortest line point and a diaperend center point at which the end in the diaper longitudinal directionin the abdomen-side waist area and the diaper longitudinal center lineintersect is 170 to 250 mm.

In a further aspect of the solution according to the present invention,the ratio of the straight-line distance between the shortest line pointand the diaper end center point at which the end in the diaperlongitudinal direction in the abdomen-side waist area and the diaperlongitudinal center line intersect, to the straight-line distancebetween the abdomen-side end and the back-side end on the diaperlongitudinal center line is 45.5 to 50.0%.

Effect of the Invention

In this invention, the back-side end of the abdomen-side flap isconfigured to reduce contact with a leg of a pet. Therefore, thedisposable diaper for pets fits well around the legs of the pet.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view showing a disposable diaper for pets in itsunfolded state according to a first embodiment of the present invention.

FIG. 2 is a plan view for showing an absorbent-core non-arrangementregion in the unfolded state of the disposable diaper.

FIG. 3 is a plan view for showing a structure of an abdomen-side flap.

FIG. 4 is an explanatory drawing regarding to measurement for specifyinga preferable structure of the abdomen-side flap.

FIG. 5 is an explanatory drawing for illustrating the relation betweenthe disposable diaper and legs of the pet FIG. 6 is a plan view forshowing a leakproof sheet fixed part in the unfolded state of thedisposable diaper.

FIG. 7 is a sectional view taken along line A-A in FIG. 1.

FIG. 8 is a sectional view taken along line B-B in FIG. 1.

FIG. 9 is a sectional view taken along line C-C in FIG. 1.

FIG. 10 is an explanatory drawing for illustrating the structure of aleg stretchable elastic member and a waist stretchable elastic member.

FIG. 11 is an explanatory drawing for illustrating the operation of theleg stretchable elastic member and the waist stretchable elastic member.

FIG. 12 is an explanatory drawing in a sectional view taken along lineD-D in FIG. 1.

FIG. 13 is an explanatory drawing regarding to a back-side waist area inputting the disposable diaper on a pet.

FIG. 14 is an explanatory drawing regarding to an abdomen-side waistarea in putting the disposable diaper on a pet.

FIG. 15 is an explanatory drawing for illustrating the state of thedisposable diaper worn by a pet.

FIG. 16 is a plan view showing a disposable diaper for pets in itsunfolded state according to a second embodiment of the presentinvention.

FIG. 17 is a plan view showing a disposable diaper for pets in itsunfolded state according to a third embodiment of the present invention.

FIG. 18 is a plan view showing a disposable diaper for pets in itsunfolded state according to a fourth embodiment of the presentinvention.

FIG. 19 is a plan view showing a disposable diaper for pets in itsunfolded state according to a fifth embodiment of the present invention.

FIG. 20 is a plan view showing a disposable diaper for pets in itsunfolded state according to a sixth embodiment of the present invention.

FIG. 21 is a plan view showing a disposable diaper for pets in itsunfolded state according to a seventh embodiment of the presentinvention.

FIG. 22 is a plan view showing a disposable diaper for pets in itsunfolded state according to an seventh embodiment of the presentinvention.

FIG. 23 is a plan view showing a disposable diaper for pets in itsunfolded state according to a eighth embodiment of the presentinvention.

FIG. 24 is a plan view showing a disposable diaper for pets in itsunfolded state according to a ninth embodiment of the present invention.

FIG. 25 is a plan view showing a prior art disposable diaper for pets inits unfolded state.

FIG. 26 is an explanatory drawing for illustrating a state of the priorart disposable diaper worn by a pet.

BEST MODES FOR CARRYING OUT THE INVENTION First Embodiment

A first embodiment of the present invention is now described withreference to FIGS. 1 to 15.

FIG. 1 is a plan view showing a disposable diaper for pets in itsunfolded state. The “pet” in this embodiment widely includes vertebrates(mammals, reptiles, birds and amphibians) and invertebrates, andtypically represents pets such as cats, dogs, rabbits, hamsters, horses,cows, pigs and goats. The term “unfolded state” as used in thisembodiment refers to the state in which an unused disposable diaper isunfolded or opened and a contraction force of a stretchable elasticmember is not developed.

A disposable diaper for pets (disposable pet diaper) 100 has anabdomen-side waist area 110, a back-side waist area 130 and a crotcharea 120 between the abdomen-side waist area 110 and the back-side waistarea 130. When the disposable pet diaper 100 is worn by a pet, theabdomen-side waist area 110, the back-side waist area 130 and the crotcharea 120 are in contact with an abdomen, a back and a crotch of the pet,respectively.

The abdomen-side waist area 110, the back-side waist area 130 and thecrotch area 120 are example embodiments that correspond to the“abdomen-side waist area, the back-side waist area and the crotch areabetween the abdomen-side waist area and the back-side waist area”,respectively, according to this invention.

In the unfolded state as shown in FIG. 1, the disposable pet diaper 100has a diaper longitudinal direction Y in which the abdomen-side waistarea 110, the crotch area 120 and the back-side waist area 130contiguously extend, and a diaper transverse direction X crossing thediaper longitudinal direction Y. The term “crossing” as used in thisspecification means “perpendicularly crossing” unless otherwisespecified.

The diaper longitudinal direction Y and the diaper transverse directionX are example embodiments that correspond to the “diaper longitudinaldirection in which the abdomen-side waist area, the crotch area and theback-side waist area contiguously extend when the disposable diaper isnot worn by a pet, and a diaper transverse direction crossing the diaperlongitudinal direction”, respectively, according to this invention.

The disposable pet diaper 100 has an inside surface 100Z1 which faces apet and an outside surface 100Z2 opposite to the inside surface 100Z1.

In this embodiment, the inside surface 100Z1 may also be referred to asa pet-side surface or a pet wearing surface.

The disposable pet diaper 100 has an end 110A formed in the abdomen-sidewaist area 110 and an end 130A formed in the back-side waist area 130 inthe diaper longitudinal direction Y.

The ends 110A and 130A are an example embodiment that corresponds to the“both ends in the diaper longitudinal direction” according to thisinvention.

The disposable pet diaper 100 has a pair of ends 100A in the diapertransverse direction X. Each of the ends 100A contiguously extends overan end 150A in the diaper transverse direction and a back-side end 150Bin each of the abdomen-side flaps 150, an end 160A in the diapertransverse direction and an abdomen-side end 160B in each of theback-side flaps 160, and a leg-side end 120A between the back-side end150B of the abdomen-side flap 150 and the abdomen-side end 160B of theback-side flap 160.

The ends 100A are an example embodiment that corresponds to the “bothends in the diaper transverse direction” according to this invention.

The disposable pet diaper 100 has a tail insertion opening 190 formed ina prescribed region in the diaper longitudinal direction Y. The tailinsertion opening 190 is formed by an arcuate cut 191 extending throughthe inside surface 100Z1 and the outside surface 100Z2.

Although, in the first embodiment, the tail insertion opening 190 isformed by the arcuate cut 191, it may be a circular opening formed by anannular cut.

The tail insertion opening 190 is an example embodiment that correspondsto the “tail insertion opening formed in a prescribed region in thediaper longitudinal direction” according to this invention.

The disposable pet diaper 100 has an absorbent core 200 formed on oneside of the tail insertion opening 190 in the diaper longitudinaldirection Y and disposed in a prescribed region extending over thecrotch area 120 and the abdomen-side waist area 110. The absorbent core200 has an abdomen-side end 210, a back-side end 220 and a pair of ends230 in the diaper transverse direction.

The absorbent core 200 is formed of a mixture of a particulate orfibrous super absorbent polymer and fluff pulp or a mixture of aparticulate or fibrous super absorbent polymer, fluff pulp andthermoplastic synthetic resin fibers. Preferably, in order to preventdeformation of the absorbent core 200 and falling off of the superabsorbent polymer, the absorbent core 200 may be entirely covered with aliquid-permeable sheet such as tissue paper and hydrophilic fibernonwoven fabric. Further, preferably, the absorbent core 200 may becompressed into a prescribed thickness in the manufacturing process. Asthe super absorbent polymer, synthetic polymer-based, starch-based orcellulose-based polymer can be appropriately used.

The absorbent core 200 is an example embodiment that corresponds to the“absorbent core formed on one side of the tail insertion opening in thediaper longitudinal direction and disposed in a prescribed regionextending over the crotch area and the abdomen-side waist area”according to this invention.

As shown in FIG. 2, a region of the disposable pet diaper 100 in whichthe absorbent core 200 is not disposed is referred to as anabsorbent-core non-arrangement region 170.

In the absorbent-core non-arrangement region 170, regions adjacent tothe abdomen-side end 210 and the back-side end 220 of the absorbent core200 and to the back-side end 130A of the disposable pet diaper 100 eachform an erected region for forming an erected section 700 which isdescribed below. Specifically, the region adjacent to the abdomen-sideend 210 of the absorbent core 200, the region adjacent to the back-sideend 220 of the absorbent core 200, and the region adjacent to theback-side end 130A of the disposable pet diaper 100 are referred to asan abdomen-side erected region 171, a crotch-side erected region 173 anda back-side erected region 172, respectively.

Depending on design of the disposable pet diaper 100, part of theabsorbent core 200 may be arranged within the absorbent-corenon-arrangement region 170, especially in any of the erected regions.Specifically, part of tissue paper, pulp fibers or super absorbentpolymer may be disposed in the erected region. Even in such a case, ifthe erected region maintains its flexibility and forms the erectedsection 700, the absorbent-core non-arrangement region 170 is consideredas being substantially formed and the erected region is also consideredas being formed at the same time.

The disposable pet diaper 100 has fastening parts 300 on the both ends150A of the abdomen-side flap 150 in the diaper transverse direction.

As shown in FIG. 3, each of the fastening parts 300 has a fastening partlongitudinal direction 300X and a fastening part transverse direction300Y. In the fastening part longitudinal direction 300X, the fasteningpart 300 has a fixed part 320 in which the fastening part 300 is fixedto the disposable pet diaper 100, and a free part 310 provided to befastened to a fastening region 900.

The fastening part 300 is a fiber nonwoven fabric made of polyolefinthermoplastic synthetic fibers, or a plastic film made of polyolefinthermoplastic synthetic resin. A plurality of hooks (not shown) areprovided on the diaper inside surface 100Z1 of the free part 310. Thehooks are formed of polyolefin thermoplastic synthetic resin. Althoughthe hooks here are provided and configured to be fastened to thefastening region 900, other structures such as an adhesive can beselected for use in place of the hooks, depending on the structure ofthe fastening region 900.

The fastening part 300 is an example embodiment that corresponds to the“fastening part having a prescribed length and provided on theabdomen-side waist area” according to this invention.

The fastening part longitudinal direction 300X is an example embodimentthat corresponds to the “fastening part longitudinal direction in whichthe length of the fastening part extends” according to this invention.

The fastening part transverse direction 300Y is an example embodimentthat corresponds to the “fastening part transverse direction crossingthe fastening part longitudinal direction” according to this invention.

The disposable pet diaper 100 has flaps 140A. The flaps 140A include apair of abdomen-side flaps 150 formed on the both ends 100A in thediaper transverse direction in the abdomen-side waist area 110, and apair of back-side flaps 160 formed on the both ends 100A in the diapertransverse direction in the back-side waist area 130. The flaps 140A aredefined by a pair of virtual lines 100Y1 extending in the diaperlongitudinal direction and passing through a pair of minimum widthpoints 100AP on the ends 100A of the disposable pet diaper 100 in thediaper transverse direction between which a line connecting the ends100A in the diaper transverse direction is shortest. Specifically, thevirtual lines 100Y1 are referred to as flap boundary lines, and regionsoutside a pair of the flap boundary lines 100Y1 are referred to as flaps(the abdomen-side flaps 150, the back-side flaps 160), while an insideregion between the flap boundary lines is referred to as a body 140B.

As shown in FIG. 3, in the abdomen-side flap 150, the free end 310 ofthe fastening part 300 protrudes from the end 150A in the diapertransverse direction. A point which bisects the fastening part 300 inthe fastening part transverse direction 300Y on a boundary between theend 150A and the fastening part 300 is referred to as a fastening partmidpoint 300P1.

The back-side end 150B of the abdomen-side flap 150 is arcuately formedand extends contiguously from the end 150A of the abdomen-side flap 150in the diaper transverse direction to the leg-side end 120A.

The abdomen-side flap 150 is an example embodiment that corresponds tothe “flap formed in the abdomen-side waist area and having an end on theback side” according to this invention.

Further, the fastening part midpoint 300P1 is an example embodiment thatcorresponds to the “fastening part midpoint which bisects a length ofthe fastening part in the fastening part transverse direction on aboundary between the fastening part and the flap” according to thisinvention.

A preferable structure of the abdomen-side flap 150 is now describedwith reference to FIGS. 4 and 5.

In FIG. 4, a diaper longitudinal center line 100Y2 passes through thecenter of the disposable pet diaper 100 in the diaper transversedirection X. Specifically, the diaper longitudinal center line 100Y2coincides with a line connecting an abdomen-side end center point 110APon the center of the abdomen-side end 110A and a back-side end centerpoint 130AP on the center of the back-side end 130A in the disposablepet diaper 100.

The diaper longitudinal center line 100Y2 is an example embodiment thatcorresponds to the “diaper longitudinal center line extending in thediaper longitudinal direction and passing through a center of thedisposable diaper in the diaper transverse direction” according to thisinvention.

The distance between the abdomen-side end 110A and the back-side end130A on the diaper longitudinal center line 100Y2 is referred to as adiaper longitudinal length D1.

The diaper longitudinal length D1 is an example embodiment thatcorresponds to the “straight-line distance between the abdomen-side endand the back-side end on the diaper longitudinal center line” accordingto this invention.

Further, a point which bisects the diaper longitudinal length D1 isreferred to as a diaper center point 100P.

The diaper center point 100P is an example embodiment that correspondsto the “diaper center point which bisects the diaper longitudinal centerline on the disposable diaper” according to this invention.

In providing the structure of the abdomen-side flap 150, the inventorfocused on the relation between straight lines connecting the fasteningpart midpoint 300P1 of the fastening part 300 and the diaperlongitudinal center line 100Y2 and the shape of the back-side end 150Bof the abdomen-side flap 150.

Especially, the relation between a shortest straight-line distance 300Lof a straight line passing the back-side end 150B of the abdomen-sideflap 150, among the straight lines connecting the fastening partmidpoint 300P1 of the fastening part 300 and the diaper longitudinalcenter line 100Y2, and a point of intersection of this straight linewith the diaper longitudinal center line 100Y2 or a shortest line point300P2 was focused on.

The shortest line point 300P2 is an example embodiment that correspondsto the “shortest line point located on the diaper longitudinal centerline at a shortest straight-line distance from the fastening partmidpoint to the diaper longitudinal center line via the back-side end ofthe flap” according to this invention.

As a result of keen studies, it was found that the abdomen-side flap 150has a suitable and advantageous structure when the shortest line point300P2 is located on the abdomen-side end 110A side of the disposable petdiaper 100 beyond the diaper center point 100P.

This suitable structure of the abdomen-side flap 150 is an exampleembodiment that corresponds to the structure that “the shortest linepoint is located on an abdomen-side waist area side beyond the diapercenter point” according to this invention.

Specifically, the position of the shortest line point 300P2 has a greatinfluence on the shape of the back-side end 150B of the abdomen-sideflap 150. As described above, the back-side end 150B is arcuate andextends from the end 150A of the abdomen-side flap 150 in the diapertransverse direction to the leg-side end 120A of the disposable petdiaper 100.

In this respect, assuming that the shortest line point 300P2 is locatedon the back-side end 130A side beyond the diaper center point, theposition at which the back-side end 150B of the abdomen-side flap 150meets the leg-side end 120A is located closer to the back-side end 130Athan that in the present invention. As a result, the area of theabdomen-side flap 150 is increased. Therefore, when the disposable petdiaper 100 is put on a pet α, a longer area of the abdomen-side flap 150comes in contact with a leg α1 of the pet.

In the position of the shortest line point 300P2 according to thisinvention, however, as shown in FIG. 5, the area of the abdomen-sideflap 150 can be reduced, and the length with which the abdomen-side flap150 comes in contact with the leg α1 of the pet can be reduced.

The disposable pet diaper 100 is available in various sizescorresponding to pets of various sizes. The pets here are limited tocats and dogs. In this case, when a measured length D2 or a distancebetween the shortest line point 300P2 and the abdomen-side end centerpoint 110AP of the disposable pet diaper 100, is set to 170 to 250 mm,the suitable and advantageous abdomen-side flap 150 can be provided inthe disposable pet diaper 100 of any size.

This is an example embodiment that corresponds to the feature that “astraight-line distance between the shortest line point and a diaper endcenter point at which the end in the diaper longitudinal direction inthe abdomen-side waist area and the diaper longitudinal center lineintersect is 170 to 250 mm” according to this invention.

Further, the relation between the measured length D2 and the diaperlongitudinal length D1 of the disposable pet diaper 100 was alsoconsidered. As a result, it was found that the suitable and advantageousabdomen-side flap 150 can be provided in the disposable pet diaper 100of any size when the ratio of the measured length D2 to the diaperlongitudinal length D1 is 45.5 to 50.0%.

This is an example embodiment that corresponds to the feature that “aratio of a straight-line distance between the shortest line point andthe diaper end center point at which the end in the diaper longitudinaldirection in the abdomen-side waist area and the diaper longitudinalcenter line intersect, to a straight-line distance between theabdomen-side end and the back-side end on the diaper longitudinal centerline is 45.5 to 50.0%” according to this invention.

The disposable pet diaper 100 has the fastening region 900 which isremovably fastened to the fastening part 300.

The fastening region 900 is adhered to the outside surface 100Z2 in theback-side waist area 130. The fastening region 900 is formed by a targettape which is a fiber nonwoven fabric made of polyolefin thermoplasticsynthetic fibers, or a plastic film made of polyolefin thermoplasticsynthetic resin, and having a large number of loops (not shown) made ofpolyolefin thermoplastic synthetic resin. Depending on the structure ofthe hooks in the free part 310 of the fastening part 300, it may beconstructed without using the target tape such that the fastening part300 can be directly fastened to the nonwoven fabric forming the diaperoutside surface 100Z2. In this case, the fastening region 900 isprovided and configured as a region to which the fastening part 300 canbe fastened in the nonwoven fabric forming the diaper outside surface100Z2. Further, in the case of the structure in which an adhesive isused in the free part 310 of the fastening part 300, a plastic film isused as the fastening region 900.

The fastening region 900 is an example embodiment that corresponds tothe “fastening region provided in the back-side waist area andconfigured to receive the fastening part” according to this invention.

In the disposable pet diaper 100, a leg stretchable elastic member 400is provided in the absorbent-core non-arrangement region 170 between theend 100A in the diaper transverse direction and the absorbent core 200.

The leg stretchable elastic member 400 is arranged in a stretched state,and when using the disposable pet diaper 100, the leg stretchableelastic member 400 contracts to form leg gathers 410 which are describedbelow.

The leg stretchable elastic member 400 is arranged to extend from theabdomen-side end 110A to the back-side end 130A of the disposable petdiaper 100 in the diaper longitudinal direction Y.

Here, “to extend from the abdomen-side end 110A to the back-side end130A” of the disposable pet diaper 100 does not only mean that the legstretchable elastic member 400 continuously extends from theabdomen-side end 110A to the back-side end 130A. Specifically, the legstretchable elastic member 400 may be arranged to extend with a distancefrom the abdomen-side end 110A or the back-side end 130A only if theabdomen-side end 110A or the back-side end 130A is acted upon by thecontraction force of the leg stretchable elastic member 400 and theerected section 700 is formed.

The leg stretchable elastic member 400 is formed of synthetic or naturalrubber thread.

The disposable pet diaper 100 has a waist stretchable elastic member500. The waist stretchable elastic member 500 includes an abdomen-sidewaist stretchable elastic member 510 disposed in the absorbent-corenon-arrangement region 170 between the diaper longitudinal end 110A andthe abdomen-side end 210 of the absorbent core 200, and a back-sidewaist stretchable elastic member 520 disposed in the absorbent-corenon-arrangement region 170 between the diaper longitudinal end 130A andthe back-side end 220 of the absorbent core 200.

The waist stretchable elastic member 500 is arranged in a stretchedstate, and when using the disposable pet diaper 100, the waiststretchable elastic member 500 contracts to form waist gathers 530.

The waist stretchable elastic member 500 and the leg stretchable elasticmember 400 are arranged to overlap each other. Here, the term “overlap”as used in this embodiment does not only mean that the waist stretchableelastic member 500 and the leg stretchable elastic member 400 are indirect contact with each other. Specifically, the waist stretchableelastic member 500 and the leg stretchable elastic member 400 do notneed to be in direct contact with each other only if their contractionforces act upon each other such that a contraction force intersectingregion 180 is formed.

The waist stretchable elastic member 500 is formed of a urethane foamedsheet material.

The disposable pet diaper 100 has a leakproof sheet 800.

A leakproof sheet stretchable elastic member 600 is disposed in astretched state in the leakproof sheet 800.

The leakproof sheet 800 is disposed in a prescribed region extendingfrom each of the ends 100A in the diaper transverse direction of thedisposable pet diaper 100 to the body 140B of the disposable pet diaper100.

The leakproof sheet stretchable elastic member 600 is disposed within aspace which is created by a folded part 810 of an inner end of theleakproof sheet 800 and extends in the diaper longitudinal direction Y.

As shown in FIG. 6, the leakproof sheet 800 has a fixed part 830 whichis fixed to other components (a liquid-permeable sheet 910, aliquid-resistant sheet 920, an outer sheet 930) of the disposable petdiaper 100 by an adhesive (not shown). In FIG. 6, the fixed part 830 isshown by hatching.

The fixed part 830 is not formed in a region of the leakproof sheet 800which extends in the diaper longitudinal direction Y and overlaps withthe end 230 of the absorbent core 200 in the diaper transverse directionX. This region not having the fixed part 830 is erected by contractionof the leakproof sheet stretchable elastic member 600 and forms aleakproof wall 820 which is described below. Further, leakproof gathers840 are formed in the leakproof sheet 800 by contraction of theleakproof sheet stretchable elastic member 600.

The leakproof sheet stretchable elastic member 600 does not need to beprovided along the whole length of the region (which forms the leakproofwall 820) not having the fixed part 830 in the diaper longitudinaldirection Y. For example, it is sufficient to provide the leakproofsheet stretchable elastic member 600 only in part of the region of theleakproof wall 820 in the diaper longitudinal direction Y. Specifically,it is sufficient for the contraction force of the leakproof sheetstretchable elastic member 600 to act upon a part of the fixed part 830on the both ends of the region of the leakproof wall 820 in the diaperlongitudinal direction Y. Here, the part of the fixed part 830 on theboth ends of the region of the leakproof wall 820 in the diaperlongitudinal direction Y is referred to as a contraction force fixingpart 610.

The contraction force fixing part 610 includes an abdomen-sidecontraction force fixing part 620 and a back-side contraction forcefixing part 630.

The back-side contraction force fixing part 630 is provided between theback-side end 220 of the absorbent core 200 and the tail insertionopening 190. Specifically, by provision of this structure, theabsorbent-core non-arrangement region 170 between the back-side end 220of the absorbent core 200 and the tail insertion opening 190 is erectedby contraction of the leakproof sheet stretchable elastic member 600 andforms the erected section 700.

Further, the abdomen-side contraction force fixing part 620 is providedbetween the abdomen-side end 210 of the absorbent core 200 and theabdomen-side end 110A of the disposable pet diaper 100. Specifically, byprovision of this structure, as described below, the absorbent-corenon-arrangement region 170 between the abdomen-side end 210 of theabsorbent core 200 and the abdomen-side end 110A of the disposable petdiaper 100 is erected by contraction of the leakproof sheet stretchableelastic member 600 and forms the erected section 700.

The disposable pet diaper 100 includes the liquid-permeable sheet 910,the absorbent core 200, the liquid-resistant sheet 920, the outer sheet930 and the leakproof sheet 800.

As shown in FIGS. 7 to 9, the liquid-permeable sheet 910 is disposed onthe inside surface 100Z1 side of the disposable pet diaper 100. Theabsorbent core 200 is disposed between the liquid-permeable sheet 910and the liquid-resistant sheet 920. The outer sheet 930 is disposed onthe outside surface 100Z2 side of the liquid-resistant sheet 920. Theleakproof sheet 800 is disposed over the liquid-permeable sheet 910, theliquid-resistant sheet 920 and the outer sheet 930 in the diapertransverse direction X. As a result, the abdomen-side flap 150 and theback-side flap 160 are formed by the leakproof sheet 800 and the outersheet 930.

The leg stretchable elastic member 400 is disposed between the leakproofsheet 800 and the liquid-resistant sheet 920.

The leakproof sheet stretchable elastic member 600 is disposed in thespace inside the folded part 810 formed on the end of the leakproofsheet 800.

As shown in FIG. 7, the fastening part 300 is disposed between theleakproof sheet 800 and the outer sheet 930.

As shown in FIGS. 7 and 8, the leakproof sheet 800 not having the fixedpart 830 is erected by contraction of the leakproof sheet stretchableelastic member 600 and forms the leakproof wall 820. At this time, alarge number of creases or the leakproof gathers 840 are formed in theleakproof sheet 800.

As shown in FIG. 9, the fastening region 900 is provided on the outsidesurface 100Z2 of the outer sheet 930.

The waist stretchable elastic member 500, not shown, is disposed betweenthe liquid-permeable sheet 910 and the liquid-resistant sheet 920.

The liquid-permeable sheet 910, the liquid-resistant sheet 920, theouter sheet 930 and the leakproof sheet 800 are formed of nonwovenfabric. The nonwoven fabric can be selected from those manufactured byspun lacing, needle punching, melt blowing, thermal bonding, spunbonding or chemical bonding.

An adhesive, not shown, is used to fix the liquid-permeable sheet 910,the liquid-resistant sheet 920, the outer sheet 930 and the leakproofsheet 800 with each other and to fix the leg stretchable elastic member400, the leakproof sheet stretchable elastic member 600 and the waiststretchable elastic member 500. A hot-melt adhesive is preferably usedas the adhesive, but other adhesives such as acrylic adhesive and rubberadhesive can also be used.

The adhesive is preferably applied in any one of spiral, wave, dot andstripe patterns.

Next, the relation between the contraction forces of the leg stretchableelastic member 400 and the waist stretchable elastic member 500 isdescribed with reference to FIGS. 10 and 11. In FIGS. 10 and 11, forconvenience of explanation, the abdomen-side flaps 150 and the back-sideflaps 160 are not shown and only the body 140B is shown.

As shown in FIG. 10, the leg stretchable elastic member 400 contractsinward from the ends in the diaper longitudinal direction Y.Specifically, contraction force F1 of the leg stretchable elastic member400 acts inward in the diaper longitudinal direction Y.

The waist stretchable elastic member 500 contracts inward from the endsin the diaper transverse direction X. Specifically, contraction force F2of the waist stretchable elastic member 500 acts inward in the diapertransverse direction X.

The contraction force intersecting region 180 is a region in which thecontraction force F1 of the leg stretchable elastic member 400 and thecontraction force F2 of the waist stretchable elastic member 500intersect with each other. Therefore, contraction force F3 of thecontraction force intersecting region 180 acts inward in a directioncrossing the diaper longitudinal direction Y and the diaper transversedirection X.

The contraction force intersecting region 180 includes a firstcontraction force intersecting region 181 formed toward the abdomen-sideend 110A of the disposable pet diaper 100 and a second contraction forceintersecting region 182 formed toward the back-side end 130A.

As a result, as shown in FIG. 11, a first curved part 540 is formed inthe abdomen-side end 110A and the back-side end 130A of the disposablepet diaper 100 and bulges outward in a direction from the inside surface100Z1 to the outside surface 100Z2 of the disposable pet diaper 100 bythe contraction force F2 of the waist stretchable elastic member 500.

The first curved part 540 includes a first abdomen-side curved part 541formed in the abdomen-side end 110A of the disposable pet diaper 100 anda first back-side curved part 542 formed in the back-side end 130A.

Further, a second curved part 183 is formed in the contraction forceintersecting region 180 and curved in the direction of the insidesurface 100Z1 of the disposable pet diaper 100 by the contraction forceF3 acting on the contraction force intersecting region 180.

The second curved part 183 includes a second abdomen-side curved part184 formed in the first contraction force intersecting region 181 and asecond back-side curved part 185 formed in the second contraction forceintersecting region 182.

Now, the state in which the leg stretchable elastic member 400 and theleakproof sheet stretchable elastic member 600 are contracted isdescribed with reference to FIG. 12. FIG. 12 is a sectional view takenalong line D-D in FIG. 1, but, for convenience of explanation, part ofthe liquid-permeable sheet 910, the liquid-resistant sheet 920 and theouter sheet 930 and the whole of the absorbent core 200 and thefastening region 900 are not shown.

In FIG. 12, the leg stretchable elastic member 400 and the leakproofsheet stretchable elastic member 600 are contracted. As a result, theerected section 700 is formed by the contraction forces of the legstretchable elastic member 400 and the leakproof sheet stretchableelastic member 600. Specifically, each of the abdomen-side erectedregion 171, the back-side erected region 172 and the crotch-side erectedregion 173 in the absorbent-core non-arrangement region 170 is erectedand forms the erected section 700.

The erected section 700 includes an abdomen-side erected section 710, aback-side erected section 720 and a crotch-side erected section 730.

In this invention, as used herein, the term “erect” to form the erectedsection 700 means that the absorbent-core non-arrangement region 170deforms by the contraction force of one of the stretchable elasticmembers or by a combination of the contraction forces of two or more ofthe stretchable elastic members.

The abdomen-side erected region 171 is erected by contraction of the legstretchable elastic member 400 and forms the abdomen-side erectedsection 710.

The end of the leg stretchable elastic member 400 is arranged closer tothe abdomen-side end 110A of the disposable pet diaper 100 than the endof the leakproof sheet stretchable elastic member 600. Therefore, theabdomen-side erected section 710 more strongly receives the influence ofthe contraction force of the leg stretchable elastic member 400 than theinfluence of the contraction force of the leakproof sheet stretchableelastic member 600. Specifically, the abdomen-side fixing part 620 ofthe contraction force fixing part 610 is moved by the contraction forceof the leakproof sheet stretchable elastic member 600, which causeserection of the abdomen-side erected region 171. Therefore, theleakproof sheet stretchable elastic member 600 also forms theabdomen-side erected section 710.

The back-side erected region 172 is erected by contraction of the legstretchable elastic member 400 and forms the back-side erected section720.

The leg stretchable elastic member 400 is overlapped with the waiststretchable elastic member 500. Specifically, the both ends of the legstretchable elastic member 400 are overlapped with the abdomen-sidewaist stretchable elastic member 510 and the back-side waist stretchableelastic member 520.

The waist stretchable elastic member 500 is arranged having a prescribedlength in the diaper transverse direction. Therefore, the abdomen-sideerected section 710 and the back-side erected section 720 erect theabdomen-side waist stretchable elastic member 510 and the back-sidewaist stretchable elastic member 520, respectively. Thus, theabdomen-side erected region 171 and the back-side erected region 172 areheld in the stable erected state. Specifically, the abdomen-side waiststretchable elastic member 510 and the back-side waist stretchableelastic member 520 are provided as an erection sheet 740 to ensure theerected state of the erected section 700.

When the back-side fixing part 630 of the contraction force fixing part610 is moved by contraction of the leakproof sheet stretchable elasticmember 600, the crotch-side erected region 173 is erected and forms thecrotch-side erected section 730.

Further, as described above, the leakproof wall 820 is formed bycontraction of the leakproof sheet stretchable elastic member 600. Aspace surrounded by the leakproof wall 820, the abdomen-side erectedsection 710, the crotch-side erected section 730 and the absorbent core(not shown in FIG. 12) forms an excrement storage space 850.

A third curved part 640 is formed in a region extending from theabdomen-side end 110A to the tail insertion opening 190 in thedisposable pet diaper 100 and bulges in a direction from the insidesurface 100Z1 to the outside surface 100Z2 of the disposable pet diaper100 by the contraction force F1 of the leg stretchable elastic member400 and the leakproof sheet stretchable elastic member 600.

A fourth curved part 420 is formed in a region extending from the tailinsertion opening 190 to the back-side end 130A in the disposable petdiaper 100 and bulges in a direction from the inside surface 100Z1 tothe outside surface 100Z2 of the disposable pet diaper 100 mainly by thecontraction force F1 of the leg stretchable elastic member 400.

Next, putting the disposable pet diaper 100 on a pet is explained withreference to FIGS. 13 to 15. First, a user takes the disposable petdiaper 100 out of a package. In most cases, in the package, theabdomen-side flaps 150 and the back-side flaps 160 of the disposable petdiaper 100 are folded inward, and the disposable pet diaper 100 itselfis folded, for example, into two or three.

When using the disposable pet diaper 100, the user unfolds the foldedstructure. At this time, the leg stretchable elastic member 400, thewaist stretchable elastic member 500 and the leakproof sheet stretchableelastic member 600 contract. As a result, the erected section 700including the abdomen-side erected section 710, the back-side erectedsection 720 and the crotch-side erected section 730 is formed, and theleakproof wall 820 is formed. Further, the first curved part 540, thesecond curved part 183, the third curved part 640 and the fourth curvedpart 420 are formed, and the leg gathers 410, the waist gathers 530 andthe leakproof gathers 840 are formed. The shape of the disposable petdiaper 100 is stabilized by contraction of the leg stretchable elasticmember 400, the waist stretchable elastic member 500 and the leakproofsheet stretchable elastic member 600.

Next, the user inserts the tail of the pet α through the tail insertionopening 190 of the disposable pet diaper 100.

Then the user covers the crotch and the abdomen of the pet α with thecrotch area 120 and the abdomen-side waist area 110, with the back-sidewaist area 130 fitted closely to the back of the pet α. Then the freeend 310 of the fastening part 300 is fastened to the fastening region900. Thus, the disposable pet diaper 100 is put on the pet α.

These matters related to putting the disposable pet diaper 100 on thepet α is an example embodiment that corresponds to the feature that“when the disposable diaper is put on the pet, the crotch area and theabdomen-side waist area cover a crotch and an abdomen of the pet, whilethe back-side waist area is closely fitted to a back of the pet, and thefastening part is fastened to the fastening region” according to thisinvention.

The state of the disposable pet diaper 100 in fitting the back-sidewaist area 130 to the back of the pet α is explained with reference toFIG. 13.

The first curved part 540 bulging outward in the direction of the diaperoutside surface 100Z2 is already formed in the back-side end 130A.Further, a region extending from the back-side end 130A to the tailinsertion opening 190 is maintained in a stable shape by the fourthcurved part 420. The back-side flap 160 is curved in the direction ofthe inside surface 100Z1 of the disposable pet diaper 100 together withthe second contraction force intersecting region 182 by the secondcurved part 183.

Thus, the user can easily place the back-side end 130A along a curve ofthe back of the pet α.

Further, the back-side end 130A has a low possibility of being turnedup.

The state of the disposable pet diaper 100 in covering the crotch andthe abdomen of the pet α with the crotch area 120 and the abdomen-sidewaist area 110 and fastening the free end 310 of the fastening part 300to the fastening region 900, is explained with reference to FIG. 14.

The first curved part 540 bulging in the direction of the diaper outsidesurface 100Z2 is already formed in the abdomen-side end 110A. Further, aregion extending from the abdomen-side end 110A to the tail insertionopening 190 is maintained in a stable shape by the third curved part640.

The abdomen-side flap 150 is curved together with the first contractionforce intersecting region 181 in the direction of the inside surface100Z1 of the disposable pet diaper 100 by the second curved part 183. Inthe abdomen-side flap 150 having the fastening part 300, the transverseend 150A is heavier than a boundary part of the abdomen-side flap 150with the body 140B. Therefore, the boundary part of the abdomen-sideflap 150 with the body 140B is curved in the direction of the insidesurface 100Z1 together with the second curved part 183, while thetransverse end 150A of the abdomen-side flap 150 is curved in thedirection of the outside surface 100Z2 by its own weight. As a result,the fastening part 300 is supported on the abdomen-side flap 150 withouthanging straight down.

Thus, the user can easily set the abdomen-side end 110A onto a curve ofthe abdomen of the pet α.

Further, the abdomen-side end 110A has a low possibility of being turnedup.

Further, the user can easily grab the fastening part 300.

Furthermore, when the user moves the fastening part 300 toward thefastening region 900, the fastening part 300 receives the influence ofthe first contraction force intersecting region 181. Therefore, whereverthe user moves the fastening part 300, the contraction force acts uponthe fastening part 300. As a result, the user can easily move thefastening part 300 onto a desired position of the fastening region 900.

FIG. 15 is a drawing for illustrating the state of the disposable petdiaper 100 worn by the pet α.

Even after the disposable pet diaper 100 has been put on the pet, theleg stretchable elastic member 400, the waist stretchable elastic member500 and the leakproof sheet stretchable elastic member 600 aremaintained in the contracted state. Therefore, the erected section 700including the abdomen-side erected section 710, the back-side erectedsection 720 and the crotch-side erected section 730 is maintained in theerected state. The leakproof wall 820 is also maintained. Further, thefirst curved part 540, the second curved part 183, the third curved part640 and the fourth curved part 420 are maintained in the curved state.The leg gathers 410, the waist gathers 530 and the leakproof gathers 840are maintained.

When the pet α excretes, excrement is held within the excrement storagespace 850. When the excrement is urine, it is absorbed by the absorbentcore 200. When the excrement is feces, part of feces is absorbed by theabsorbent core 200 and the rest is held within the excrement storagespace 850.

Whether the excrement is urine or feces, the weight of the absorbentcore 200 is received in the fastening part longitudinal direction 300Xin the free part 310 of the fastening part 300.

This is an example embodiment that corresponds to the feature that “theweight of the absorbent core after excretion is received in thelongitudinal direction of the fastening part while the disposable diaperis worn by the pet” according to this invention.

In order to remove the disposable pet diaper 100 from the pet α, thefastening part 300 is detached from the fastening region 900, and thenthe disposable pet diaper 100 is pulled off through the tail insertionopening 190 and disposed of.

In the process of detaching the fastening part 300 from the fasteningregion 900 and pulling off the disposable pet diaper 100 through thetail insertion opening 190, the abdomen-side end 110A is turnedobliquely downward from the pet α. Even at this time, the risk offalling of feces can be reduced by the abdomen-side erected section 710.

Second to tenth embodiments of the present invention are now describedwith reference to FIGS. 16 to 24. In the description of the second totenth embodiments, components which are identical to those in the firstembodiment are not described in detail and their reference numerals areomitted.

Second Embodiment

The second embodiment of the present invention is explained withreference to FIG. 16. A disposable pet diaper 101 according to thesecond embodiment is different from the disposable pet diaper 100 of thefirst embodiment in that a leg stretchable elastic member 401 includes aplurality of leg stretchable elastic members. Specifically, the legstretchable elastic member 401 of the second embodiment is configured bycontinuously arranging a plurality of leg stretchable elastic memberswith intervals in the diaper longitudinal direction. The number of thecontinuously arranged leg stretchable elastic members can beappropriately selected according to the disposable pet diaper to berealized.

In the second embodiment of this invention, the leg stretchable elasticmember 401 extending continuously in the diaper longitudinal directionincludes three leg stretchable elastic members, or a leg stretchableelastic member 401A in the abdomen-side waist area, a leg stretchableelastic member 401B in the crotch area, and a leg stretchable elasticmember 401C in the back-side waist area.

Like in the first embodiment, in the second embodiment, the erectedsection 700 including the abdomen-side erected section 710, theback-side erected section 720 and the crotch-side erected section 730 isformed, and the leakproof wall 820 is formed. Further, the first curvedpart 540 including the first abdomen-side curved part 541 and the firstback-side curved part 542, the second curved part 183 including thesecond abdomen-side curved part 184 and the second back-side curved part185, the third curved part 640 and the fourth curved part 420 areformed. Further, the leg gathers 410, the waist gathers 530 and theleakproof gathers 840 are formed.

Therefore, the disposable pet diaper 101 according to the secondembodiment has the same effect as the disposable pet diaper 100 of thefirst embodiment.

Furthermore, by provision of the leg stretchable elastic member 401including the three leg stretchable elastic members, the stretchingforces of the leg stretchable elastic members can be prevented fromaffecting each other. Therefore, for example, the back-side waist areais little affected by displacement (or slippage) of the abdomen-sidewaist area, if any, so that the leg stretchable elastic member 401 canbe prevented from causing displacement as a whole.

Third Embodiment

The third embodiment of the present invention is explained withreference to FIG. 17. A disposable pet diaper 102 according to the thirdembodiment is different from the disposable pet diaper 100 of the firstembodiment in that a leg stretchable elastic member 402 is notcontinuously arranged in the diaper longitudinal direction.

Specifically, in the third embodiment of this invention, the legstretchable elastic member 402 includes a leg stretchable elastic member402A arranged in the abdomen-side waist area of the disposable petdiaper 102 and a leg stretchable elastic member 402B arranged in theback-side waist area.

The third embodiment is different from the first embodiment in that theleg gathers 410 and the fourth curved part 420 are formed only in theregions of the leg stretchable elastic members 402A and 402B in thedisposable pet diaper 102.

In this structure, the erected section 700 including the abdomen-sideerected section 710, the back-side erected section 720 and thecrotch-side erected section 730 is formed, and the leakproof wall 820 isformed. Further, the first curved part 540 including the firstabdomen-side curved part 541 and the first back-side curved part 542,the second curved part 183 including the second abdomen-side curved part184 and the second back-side curved part 185, the third curved part 640and part of the fourth curved part 420 are formed. Further, part of theleg gathers 410, the waist gathers 530 and the leakproof gathers 840 areformed.

Therefore, the disposable pet diaper 102 according to the thirdembodiment has all of the effects of the disposable pet diaper 100 ofthe first embodiment other than those exhibited by the whole leg gathers410 and the whole fourth curved part 420.

Furthermore, in this structure, the stretchable elastic member is notprovided in the crotch area in which the absorbent core is disposed, andnor in the free end of the leakproof gathers. Therefore, the absorbentcore does not shrink, so that the area of the absorbent core can beeffectively used.

Further, a pocket space can be readily formed in both end regions of theabsorbent core in the diaper longitudinal direction.

Moreover, the stretchable elastic member is not provided in thefastening region. Therefore, the fastening region does not shrink, sothat the fastening part can be easily engaged with the fastening region.

Fourth Embodiment

The fourth embodiment of the present invention is explained withreference to FIG. 18. A disposable pet diaper 103 according to thefourth embodiment is different from the disposable pet diaper 100 of thefirst embodiment in that a leg stretchable elastic member 403 is notprovided in the back-side waist area. Further, the contraction force ofthe leakproof sheet stretchable elastic member exerts no influence onthe abdomen-side end of the disposable pet diaper 103.

Compared with the disposable pet diaper 100 of the first embodiment, thedisposable pet diaper 103 of the fourth embodiment is different in thatthe leg gathers 410 and the fourth curved part 420 are formed only inthe region of the leg stretchable elastic member 403. Further, theback-side erected section 720 of the erected section 700 and the secondback-side curved part 185 of the second curved part 183 are not formed.

In this structure, the erected section 700 including the abdomen-sideerected section 710 and the crotch-side erected section 730 is formed,and the leakproof wall 820 is formed. Further, the first curved part 540including the first abdomen-side curved part 541 and the first back-sidecurved part 542, the second curved part 183 including the secondabdomen-side curved part 184, the third curved part 640 and part of thefourth curved part 420 are formed. Further, part of the leg gathers 410,the waist gathers 530 and the leakproof gathers 840 are formed.

Therefore, the disposable pet diaper 103 according to the fourthembodiment has all of the effects of the disposable pet diaper 100 ofthe first embodiment other than those exhibited by the whole leg gathers410, the back-side erected section 720, the second back-side curved part185 and the whole fourth curved part 420.

Further, a pocket space can be readily formed in back-side andabdomen-side end regions of the absorbent core.

Fifth Embodiment

The fifth embodiment of the present invention is explained withreference to FIG. 19. A disposable pet diaper 104 according to the fifthembodiment is different from the disposable pet diaper 100 of the firstembodiment in that a leg stretchable elastic member 404 is not providedin the abdomen-side waist area. Further, the contraction force of theleakproof sheet stretchable elastic member exerts no influence on theback-side end of the disposable pet diaper 104.

Compared with the disposable pet diaper 100 of the first embodiment, thedisposable pet diaper 104 of the fifth embodiment is different in thatthe leg gathers 410 are formed only in the region of the leg stretchableelastic member 404. Further, the abdomen-side erected section 710 of theerected section 700 and the second abdomen-side curved part 184 of thesecond curved part 183 are not formed.

In this structure, the erected section 700 including the back-sideerected section 720 and the crotch-side erected section 730 is formed,and the leakproof wall 820 is formed. Further, the first curved part 540including the first abdomen-side curved part 541 and the first back-sidecurved part 542, the second curved part 183 including the secondback-side curved part 185, the third curved part 640 and the fourthcurved part 420 are formed. Further, part of the leg gathers 410, thewaist gathers 530 and the leakproof gathers 840 are formed.

Therefore, the disposable pet diaper 104 according to the fifthembodiment has all of the effects of the disposable pet diaper 100 ofthe first embodiment other than those exhibited by the whole leg gathers410, the abdomen-side erected section 710 and the second abdomen-sidecurved part 184.

Further, the absorbent core is not subjected to a contraction force, sothat the area of the absorbent core can be effectively used.

Moreover, by provision of the leg stretchable elastic member only in theback-side area, it is made easier to fit the disposable pet diaper alongthe back of the pet. As a result, the fastening part can be easilyengaged with the fastening region.

Sixth Embodiment

The sixth embodiment of the present invention is explained withreference to FIG. 20. A disposable pet diaper 105 according to the sixthembodiment is different from the disposable pet diaper 100 of the firstembodiment in that a leg stretchable elastic member is not provided, anda leakproof sheet stretchable elastic member 601 is arranged to extendfrom the abdomen-side end to the back-side end of the disposable petdiaper 105. The abdomen-side fixing part and the back-side fixing partare formed on the abdomen-side end and the back-side end of thedisposable pet diaper 105, respectively, in the fixed part of theleakproof sheet. The leakproof sheet stretchable elastic member 601 isoverlapped with the abdomen-side waist stretchable elastic member andthe back-side waist stretchable elastic member of the waist stretchableelastic member.

A comparison is made between the disposable pet diaper 100 of the firstembodiment and the disposable pet diaper 105 of the sixth embodiment. Inthe disposable pet diaper 105 of the sixth embodiment, the erectedsection 700 including the abdomen-side erected section 710 and theback-side erected section 720, the leakproof wall 820, the leakproofgathers 840, the third curved part 640 and the fourth curved part 420are formed by the action of the leakproof sheet stretchable elasticmember 601.

The first abdomen-side curved part 541 and the first back-side curvedpart 542 are formed by the action of the waist stretchable elasticmember, or by the actions of the abdomen-side waist stretchable elasticmember and the back-side waist stretchable elastic member, respectively.

The first contraction force intersecting region 181 is formed by thecontraction force of the leakproof sheet stretchable elastic member 601and the contraction force of the abdomen-side waist stretchable elasticmember. As a result, the second abdomen-side curved part 184 is formed.

Further, the second contraction force intersecting region 182 is formedby the leakproof sheet stretchable elastic member 601 and thecontraction force of the back-side waist stretchable elastic member. Asa result, the second back-side curved part 185 is formed.

Specifically, in the disposable pet diaper 105 of the sixth embodiment,unlike in the disposable pet diaper 100 of the first embodiment, thecrotch-side erected section 730 and the leg gathers 410 are not formed.

Therefore, the disposable pet diaper 105 of the sixth embodiment has allof the effects of the disposable pet diaper 100 of the first embodimentother than those exhibited by the leg gathers 410 and the crotch-sideerected section 730.

Furthermore, in the disposable pet diaper 105 of the sixth embodiment,due to the absence of the leg stretchable elastic member, the ends ofthe disposable pet diaper 105 in the diaper transverse direction can belocated closer to the absorbent core. As a result, a portion of thedisposable pet diaper 105 which comes in contact with the pet's legs canbe further reduced.

Further, due to the absence of a sheet forming a portion around legs,the disposable pet diaper when worn can be made neat around legs.

Seventh Embodiment

The seventh embodiment of the present invention is explained withreference to FIG. 21. A disposable pet diaper 106 according to theseventh embodiment is different from the disposable pet diaper 100 ofthe first embodiment in that a leg stretchable elastic member 404 is notprovided in the abdomen-side waist area and the back-side waist area.Further, the contraction force of the leakproof sheet stretchableelastic member exerts no influence on the abdomen-side end of thedisposable pet diaper 106. Further, an abdomen-side waist stretchableelastic member 511 is overlapped with fastening parts 301. The featurethat “an abdomen-side waist stretchable elastic member is overlappedwith fastening parts” according to this invention does not mean that theabdomen-side waist stretchable elastic member is in direct contact withthe fastening parts. Specifically, it means that the contraction forceof the abdomen-side waist stretchable elastic member does not act on thefastening parts via flaps, but it directly act on them.

A comparison is made between the disposable pet diaper 100 of the firstembodiment and the disposable pet diaper 106 of the seventh embodiment.In the disposable pet diaper 106 of the seventh embodiment, the leggathers 410 are formed only in a region of the leg stretchable elasticmember 401. Further, the abdomen-side erected section 710 and theback-side erected section 720 of the erected section 700 are not formed.The second abdomen-side curved part 184 and the second back-side curvedpart 185 of the second curved part 183 are not formed. The fourth curvedpart 420 is formed only in the region of the leg stretchable elasticmember 405.

In this structure, the erected section 700 including the crotch-sideerected section 730 is formed, and the leakproof wall 820 is formed.Further, the first curved part 540 including the first abdomen-sidecurved part 541 and the first back-side curved part 542, the thirdcurved part 640 and part of the fourth curved part 420 are formed. Partof the leg gathers 410 and the leakproof gathers 840 are formed.

Therefore, the disposable pet diaper 106 according to the seventhembodiment has those of the effects of the disposable pet diaper 100 ofthe first embodiment which are exhibited by the crotch-side erectedsection 730, the leakproof wall 820, the first abdomen-side curved part541, the first back-side curved part 542, the third curved part 640,part of the fourth curved part 420, part of the leg gathers 410 and theleakproof gathers 840.

Furthermore, by provision of the abdomen-side waist stretchable elasticmember 511 overlapped with the fastening parts 301, when theabdomen-side waist area is set on the abdomen of the pet in order to putthe disposable pet diaper 106 on the pet, the fastening parts 301 arecurved inside the disposable pet diaper under the influence of thecontraction force of the abdomen-side waist stretchable elastic member511. Thus, it is made easier for the user to grab the fastening parts301.

Eighth Embodiment

The eighth embodiment of the present invention is explained withreference to FIG. 22. A disposable pet diaper 107 according to theeighth embodiment is different from the disposable pet diaper 100 of thefirst embodiment in that a leg stretchable elastic member 406 is notprovided in the abdomen-side waist area and the back-side waist area ofthe disposable pet diaper 107. Further, a leakproof sheet stretchableelastic member 603 is arranged to extend from the abdomen-side end tothe back-side end of the disposable pet diaper 107. The abdomen-sidefixing part and the back-side fixing part are formed on the abdomen-sideend and the back-side end of the disposable pet diaper 107,respectively, in the fixed part of the leakproof sheet. The leakproofsheet stretchable elastic member 603 is overlapped with an abdomen-sidewaist stretchable elastic member 512 and the back-side waist stretchableelastic member of the waist stretchable elastic member. The abdomen-sidewaist stretchable elastic member 512 is overlapped with the fasteningparts 302.

A comparison is made between the disposable pet diaper 100 of the firstembodiment and the disposable pet diaper 107 of the eighth embodiment.In the disposable pet diaper 107 of the eighth embodiment, the erectedsection 700 including the abdomen-side erected section 710 and theback-side erected section 720, the leakproof wall 820, the leakproofgathers 840, the third curved part 640 and the fourth curved part 420are formed by the action of the leakproof sheet stretchable elasticmember 603.

The first abdomen-side curved part 541 and the first back-side curvedpart 542 are formed by the action of the waist stretchable elasticmember, or by the actions of the abdomen-side waist stretchable elasticmember 512 and the back-side waist stretchable elastic member,respectively.

The first contraction force intersecting region 181 is formed by thecontraction force of the leakproof sheet stretchable elastic member 603and the contraction force of the abdomen-side waist stretchable elasticmember. As a result, the second abdomen-side curved part 184 is formed.

Further, the second contraction force intersecting region 182 is formedby the contraction force of the leakproof sheet stretchable elasticmember 603 and the contraction force of the back-side waist stretchableelastic member. As a result, the second back-side curved part 185 isformed.

Specifically, in the disposable pet diaper 107 of the eighth embodiment,unlike in the disposable pet diaper 100 of the first embodiment, thecrotch-side erected section 730 and part of the leg gathers 410 are notformed.

Therefore, the disposable pet diaper 107 of the eighth embodiment hasall of the effects of the disposable pet diaper 100 of the firstembodiment other than those exhibited by the whole leg gathers 410 andthe crotch-side erected section 730.

Furthermore, due to the absence of the waist stretchable elastic memberin the abdomen-side region and the back-side region, the abdomen-sideregion and the back-side region can be fitted around the waist of thepet while the fastening member is engaged.

Further, a pocket can be formed in both end regions of the absorbentcore in the diaper longitudinal direction.

Furthermore, by provision of the abdomen-side waist stretchable elasticmember 512 overlapped with the fastening parts 302, when theabdomen-side waist area is set on the abdomen of the pet in order to putthe disposable pet diaper 107 on the pet, the fastening parts 302 arecurved inside the disposable pet diaper under the influence of thecontraction force of the abdomen-side waist stretchable elastic member512. Thus, it is made easier for the user to grab the fastening parts302.

Ninth Embodiment

The ninth embodiment of the present invention is explained withreference to FIG. 23. A disposable pet diaper 108 according to the ninthembodiment is different from the disposable pet diaper 100 of the firstembodiment in that a leakproof sheet stretchable elastic member 604 isarranged to extend from the abdomen-side end to the back-side end of thedisposable pet diaper 108. The abdomen-side fixing part and theback-side fixing part are formed on the abdomen-side end and theback-side end of the disposable pet diaper 108, respectively, in thefixed part of the leakproof sheet. The leakproof sheet stretchableelastic member 604 is overlapped with an abdomen-side waist stretchableelastic member 513 and the back-side waist stretchable elastic member ofthe waist stretchable elastic member. Further, the abdomen-side waiststretchable elastic member 513 is overlapped with fastening parts 303.

A comparison is made between the disposable pet diaper 100 of the firstembodiment and the disposable pet diaper 108 of the ninth embodiment. Inthe disposable pet diaper 108 of the ninth embodiment, the erectedsection 700 including the abdomen-side erected section 710 and theback-side erected section 720, the leg gathers 410, the leakproof wall820, the leakproof gathers 840, the third curved part 640 and the fourthcurved part 420 are formed by the actions of a leg stretchable elasticmember 407 and the leakproof sheet stretchable elastic member 604.

The first abdomen-side curved part 541 and the first back-side curvedpart 542 are formed by the action of the waist stretchable elasticmember, or by the actions of the abdomen-side waist stretchable elasticmember 513 and the back-side waist stretchable elastic member,respectively.

Two structures of the first contraction force intersecting regions 181are formed. One is formed by intersection of the contraction forces ofthe leg stretchable elastic member 407 and the abdomen-side waiststretchable elastic member 513, and the other is formed by thecontraction force of the leakproof sheet stretchable elastic member 604and the contraction force of the abdomen-side waist stretchable elasticmember 513. Accordingly, two structures of the second abdomen-sidecurved parts 184 are formed by formation of the two first contractionforce intersecting regions 181.

Similarly, two structures of the second contraction force intersectingregions 182 are formed. One is formed by intersection of the contractionforces of the leg stretchable elastic member 407 and the back-side waiststretchable elastic member, and the other is formed by the contractionforce of the leakproof sheet stretchable elastic member 604 and thecontraction force of the back-side waist stretchable elastic member.Accordingly, two structures of the second back-side curved parts 185 areformed by formation of the two second contraction force intersectingregions 182.

Specifically, unlike in the disposable pet diaper 100 of the firstembodiment, the crotch-side erected section 730 is not formed in thedisposable pet diaper 108 of the ninth embodiment.

Therefore, the disposable pet diaper 108 of the ninth embodiment has allof the effects of the disposable pet diaper 100 of the first embodimentother than those exhibited by the crotch-side erected section 730.

Furthermore, by provision of the abdomen-side waist stretchable elasticmember 513 overlapped with the fastening parts 303, when theabdomen-side waist area is set on the abdomen of the pet in order to putthe disposable pet diaper 108 on the pet, the fastening parts 303 arecurved inside the disposable pet diaper under the influence of thecontraction force of the abdomen-side waist stretchable elastic member513. Thus, it is made easier for the user to grab the fastening parts303.

Further, the contraction forces act over the whole diaper in the diaperlongitudinal direction, so that leakage of excrement can be prevented.Therefore, this disposable pet diaper is particularly suitable forbedridden pets.

Tenth Embodiment

The tenth embodiment of the present invention is explained withreference to FIG. 24. A disposable pet diaper 109 according to the tenthembodiment is different from the disposable pet diaper 100 of the firstembodiment in that a leg stretchable elastic member 408 is not providedin the back-side waist area. Further, a leakproof sheet stretchableelastic member 605 is arranged to extend up to the abdomen-side end ofthe disposable pet diaper 109. The abdomen-side fixing part is formed onthe abdomen-side end of the disposable pet diaper 109 in the fixed partof the leakproof sheet. The leakproof sheet stretchable elastic member602 is overlapped with an abdomen-side waist stretchable elastic member514 of the waist stretchable elastic member. Further, the abdomen-sidewaist stretchable elastic member 514 is overlapped with fastening parts304.

A comparison is made between the disposable pet diaper 100 of the firstembodiment and the disposable pet diaper 109 of the tenth embodiment. Inthe disposable pet diaper 109 of the tenth embodiment, the erectedsection 700 including the abdomen-side erected section 710 and thecrotch-side erected section 730, part of the leg gathers 410, theleakproof wall 820, the leakproof gathers 840, the third curved part 640and part of the fourth curved part 420 are formed by the actions of theleg stretchable elastic member 408 and the leakproof sheet stretchableelastic member 605.

The first abdomen-side curved part 541 is formed by the action of thewaist stretchable elastic member or the abdomen-side waist stretchableelastic member 514.

Two structures of the first contraction force intersecting regions 181are formed. One is formed by intersection of the contraction forces ofthe leg stretchable elastic member 408 and the abdomen-side waiststretchable elastic member 514, and the other is formed by thecontraction force of the leakproof sheet stretchable elastic member 605and the contraction force of the abdomen-side waist stretchable elasticmember 514. Accordingly, two structures of the second abdomen-sidecurved parts 184 are formed by formation of the two first contractionforce intersecting regions 181.

Specifically, unlike in the disposable pet diaper 100 of the firstembodiment, the back-side erected section 720, part of the leg gathers410, the first back-side curved part 542, the second back-side curvedpart 185 and part of the fourth curved part 420 are not formed in thedisposable pet diaper 109 of the tenth embodiment.

Therefore, the disposable pet diaper 109 of the tenth embodiment has allof the effects of the disposable pet diaper 100 of the first embodimentother than those exhibited by the back-side erected section 720, thewhole leg gathers 410, the first back-side curved part 542, the secondback-side curved part 185 and the whole fourth curved part 420.

In this structure, the contraction forces strongly act only on theabdomen-side region, so that a pocket can be readily formed in anabdomen-side region of the absorbent core. Therefore, this disposablepet diaper is suitable as a disposable diaper for male pets.

Furthermore, by provision of the abdomen-side waist stretchable elasticmember 514 overlapped with the fastening parts 304, when theabdomen-side waist area is set on the abdomen of the pet in order to putthe disposable pet diaper 109 on the pet, the fastening parts 304 arecurved inside the disposable pet diaper under the influence of thecontraction force of the abdomen-side waist stretchable elastic member514. Thus, it is made easier for the user to grab the fastening parts304.

The structures or features of the disposable pet diaper according tothis invention are not limited to those described above. The structuresor features of the first to tenth embodiments can be appropriately usedin combination.

(Correspondences Between the Features of the Embodiments and theFeatures of the Invention)

The disposable pet diaper 100, 101, 102, 103, 104, 105, 106, 107, 108,109 is an example embodiment that corresponds to the “disposable diaperfor pets” according to this invention. The back-side waist area 130 isan example embodiment that corresponds to the “back-side waist area”according to this invention. The abdomen-side waist area 110 is anexample embodiment that corresponds to the “abdomen-side waist area”according to this invention. The crotch area 120 is an exampleembodiment that corresponds to the “crotch area” according to thisinvention. The abdomen-side flap 150 is an example embodiment thatcorresponds to the “flap” according to this invention. The diaperlongitudinal direction Y and the diaper transverse direction X areexample embodiments that correspond to the “diaper longitudinaldirection” and the “diaper transverse direction”, respectively,according to this invention. The ends 110A and 130A are an exampleembodiment that corresponds to the “both ends in the diaper longitudinaldirection” according to this invention. The ends 100A are an exampleembodiment that corresponds to the “both ends in the diaper transversedirection” according to this invention. The diaper longitudinal centerline 100Y2 is an example embodiment that corresponds to the “diaperlongitudinal center line” according to this invention. The diaper centerpoint 100P is an example embodiment that corresponds to the “diapercenter point” according to this invention. The tail insertion opening190 is an example embodiment that corresponds to the “tail insertionopening” according to this invention. The absorbent core 200 is anexample embodiment that corresponds to the “absorbent core” according tothis invention. The fastening part 300, 301, 302, 303, 304 is an exampleembodiment that corresponds to the “fastening part” according to thisinvention. The fastening part longitudinal direction 300X is an exampleembodiment that corresponds to the “fastening part longitudinaldirection” according to this invention. The fastening part transversedirection 300Y is an example embodiment that corresponds to the“fastening part transverse direction” according to this invention. Thefastening part midpoint 300P1 is an example embodiment that correspondsto the “fastening part midpoint” according to this invention. Thefastening region 900 is an example embodiment that corresponds to the“fastening region” according to this invention. The shortest line point300P2 is an example embodiment that corresponds to the “shortest linepoint” according to this invention. The measured length D2 is an exampleembodiment that corresponds to the “straight-line distance between theshortest line point and a diaper end center point at which the end inthe diaper longitudinal direction in the abdomen-side waist area and thediaper longitudinal center line intersect” according to this invention.The diaper longitudinal length D1 is an example embodiment thatcorresponds to the “straight-line distance between the abdomen-side endand the back-side end on the diaper longitudinal center line” accordingto this invention.

In view of the nature of the above-described invention, various featurescan be provided as follows.

(Aspect 1)

A disposable diaper for pets, comprising:

a back-side waist area, an abdomen-side waist area and a crotch areabetween the back-side waist area and the abdomen-side waist area,

a flap formed in the abdomen-side waist area and having an end on theback side,

a diaper longitudinal direction in which the back-side waist area, thecrotch area and the abdomen-side waist area contiguously extend when thedisposable diaper is not worn by a pet, and a diaper transversedirection crossing the diaper longitudinal direction,

both ends in the diaper longitudinal direction, and both ends in thediaper transverse direction,

a diaper longitudinal center line extending in the diaper longitudinaldirection and passing through a center of the disposable diaper in thediaper transverse direction,

a diaper center point which bisects the diaper longitudinal center lineon the disposable diaper,

a tail insertion opening formed in a prescribed region in the diaperlongitudinal direction,

an absorbent core formed on one side of the tail insertion opening inthe diaper longitudinal direction and disposed in a prescribed regionextending over the crotch area and the abdomen-side waist area,

a fastening part having a prescribed length and provided on the flap,

a fastening part longitudinal direction in which the length of thefastening part extends and a fastening part transverse directioncrossing the fastening part longitudinal direction,

a fastening part midpoint which bisects a length of the fastening partin the fastening part transverse direction on a boundary between thefastening part and the flap,

a fastening region provided in the back-side waist area and configuredto receive the fastening part, and

a shortest line point located on the diaper longitudinal center line ata shortest straight-line distance from the fastening part midpoint tothe diaper longitudinal center line via the back-side end of the flap,wherein:

when the disposable diaper is put on the pet, the crotch area and theabdomen-side waist area cover a crotch and an abdomen of the pet, whilethe back-side waist area is closely fitted to a back of the pet, and thefastening part is fastened to the fastening region,

the weight of the absorbent core after excretion is received in thelongitudinal direction of the fastening part while the disposable diaperis worn by the pet, and

the shortest line point is located on an abdomen-side waist area sidebeyond the diaper center point.

(Aspect 2)

The disposable diaper as defined in aspect 1, wherein a straight-linedistance between the shortest line point and a diaper end center pointat which the end in the diaper longitudinal direction in theabdomen-side waist area and the diaper longitudinal center lineintersect is 170 to 250 mm.

(Aspect 3)

The disposable diaper as defined in aspect 1, wherein a ratio of astraight-line distance between the shortest line point and the diaperend center point at which the end in the diaper longitudinal directionin the abdomen-side waist area and the diaper longitudinal center lineintersect, to a straight-line distance between the abdomen-side end andthe back-side end on the diaper longitudinal center line is 45.5 to50.0%.

(Aspect 4)

The disposable diaper as defined in any one of aspects 1 to 3,comprising:

an absorbent-core non-arrangement region in which the absorbent core isnot disposed,

a first stretchable elastic member disposed in a prescribed region inthe diaper longitudinal direction, and

an erected section that is formed by the end in the diaper longitudinaldirection being erected by contraction of the first stretchable elasticmember.

(Aspect 5)

The disposable diaper as defined in aspect 4, wherein the firststretchable elastic member is disposed in a stretched state between theabsorbent core and each of the ends in the diaper transverse direction,and forms leg gathers by contracting.

(Aspect 6)

The disposable diaper as defined in aspect 4, comprising a leakproofsheet, wherein the first stretchable elastic member is disposed in astretched state in the leakproof sheet and forms a leakproof wall andleakproof gathers by contracting.

(Aspect 7)

The disposable diaper as defined in any one of aspects 4 to 6, whereinthe erected section is formed on the end in the diaper longitudinaldirection in the abdomen-side waist area.

(Aspect 8)

The disposable diaper as defined in any one of aspects 4 to 6, whereinthe erected section is formed on the end in the diaper longitudinaldirection in the back-side waist area.

(Aspect 9)

The disposable diaper as defined in any one of aspects 4 to 6, whereinthe erected section comprises a first erected section formed on the endin the diaper longitudinal direction in the abdomen-side waist area anda second erected section formed on the end in the diaper longitudinaldirection in the back-side waist area.

(Aspect 10)

The disposable diaper as defined in any one of aspects 4 to 9, whereinan erection sheet is provided in an end region of the absorbent-corenon-arrangement region in the diaper longitudinal direction, and theerection sheet is erected by contraction of the first stretchableelastic member and forms the erected section.

(Aspect 11)

The disposable diaper as defined in aspect 10, wherein the erectionsheet is a second stretchable elastic member.

(Aspect 12)

The disposable diaper as defined in any one of aspects 4 to 11, wherein,when the disposable diaper is ready to be put on the pet, the firststretchable elastic member is already contracted so that the erectedsection is already formed.

(Aspect 13)

The disposable diaper as defined in any one of aspects 4 to 12, wherein,while the disposable diaper is worn by the pet, the first stretchableelastic member is maintained in a contracted state so that the erectedsection is maintained in an erected state.

(Aspect 14)

The disposable diaper as defined in any one of aspects 1 to 13,comprising the first stretchable elastic member, the second stretchableelastic member, and a contraction force intersecting region in whichcontraction force of the first stretchable elastic member andcontraction force of the second stretchable elastic member intersectwith each other.

(Aspect 15)

The disposable diaper as defined in aspect 14, wherein the secondstretchable elastic member is disposed between the absorbent core andeach of the ends in the diaper transverse direction and forms waistgathers by contracting.

(Aspect 16)

The disposable diaper as defined in aspect 14 or 15, wherein the firststretchable elastic member and the second stretchable elastic member areoverlapped with each other.

(Aspect 17)

The disposable diaper as defined in any one of aspects 14 to 16, whereina first curved part is formed in the ends in the diaper longitudinaldirection and curved outward when the disposable diaper is put on thepet, and a second curved part is formed in the contraction forceintersecting region and curved inward when the disposable diaper is puton the pet.

(Aspect 18)

The disposable diaper as defined in any one of aspects 14 to 17, whereinthe contraction force intersecting region is formed in the abdomen-sidewaist area.

(Aspect 19)

The disposable diaper as defined in any one of aspects 14 to 17, whereinthe contraction force intersecting region is formed in the back-sidewaist area.

(Aspect 20)

The disposable diaper as defined in any one of aspects 14 to 17, whereinthe contraction force intersecting region includes a first contractionforce intersecting region formed in the abdomen-side waist area and asecond contraction force intersecting region formed in the back-sidewaist area.

(Aspect 21)

The disposable diaper as defined in any one of aspects 14 to 20,wherein, when the disposable diaper is ready to be put on the pet, thefirst and second stretchable elastic members are already contracted sothat the contraction force intersecting region is already formed.

(Aspect 22)

The disposable diaper as defined in any one of aspects 14 to 21,wherein, while the disposable diaper is worn by the pet, the first andsecond stretchable elastic members are maintained in a contracted stateso that the contraction force intersecting region is maintained.

(Aspect 23)

The disposable diaper as defined in any one of aspects 1 to 22,comprising:

the first stretchable elastic member arranged in the diaper longitudinaldirection,

a fixed part for fixing contraction force of the stretchable elasticmember onto the absorbent-core non-arrangement region, and

a crotch-side erected section that is formed by the absorbent-corenon-arrangement region being erected between the fixed part and theabsorbent core by contraction of the stretchable elastic member.

(Aspect 24)

The disposable diaper as defined in aspect 23, wherein the erectedsection is formed between an end of the absorbent core in the diaperlongitudinal direction and the tail insertion opening in the crotcharea.

(Aspect 25)

The disposable diaper as defined in aspect 23 or 24, wherein, when thedisposable diaper is ready to be put on the pet, the first stretchableelastic member is already contracted so that the crotch-side erectedsection is already formed.

(Aspect 13)

The disposable diaper as defined in any one of aspects 23 to 25,wherein, while the disposable diaper is worn by the pet, the firststretchable elastic member is maintained in a contracted state so thatthe crotch-side erected section is maintained in an erected state.

DESCRIPTION OF THE NUMERALS

-   100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 1000 disposable    pet diaper-   100A end in the diaper transverse direction-   100P diaper center point-   100Y1 flap boundary line-   100Y2 diaper longitudinal center line-   100Z1 inside surface-   100Z2 outside surface-   110, 1110 abdomen-side waist area-   110A, 1110A abdomen-side end-   110AP abdomen-side end center point-   120, 1120 crotch area-   120A leg-side end-   130, 1130 back-side waist area-   130A, 1130A back-side end-   130AP back-side end center point-   140A flap-   140B body-   150, 1150 abdomen-side flap-   150A end in the diaper transverse direction-   150B, 1150B back-side end-   160, 1160 back-side flap-   170 absorbent-core non-arrangement region-   171 abdomen-side erected region-   172 back-side erected region-   173 crotch-side erected region-   180 contraction force intersecting region-   181 first contraction force intersecting region-   182 second contraction force intersecting region-   183 second curved part-   184 second abdomen-side curved part-   185 second back-side curved part-   190, 1190 tail insertion opening-   191 cut-   200, 2000 absorbent core-   210 abdomen-side end-   220 back-side end-   230 end in the diaper transverse direction-   300, 301, 302, 303, 304, 3000 fastening part-   310 free part-   320 fixed part-   300P1 fastening part midpoint-   300P2 shortest line point-   300L shortest straight-line distance-   300X fastening part longitudinal direction-   300Y fastening part transverse direction-   400, 401, 401A, 401B, 401C, 402, 402A, 402B, 403, 404, 405, 406,    407, 408, 4000 leg stretchable elastic member-   410, 4410 leg gather-   420 fourth curved part-   500 waist stretchable elastic member-   510, 511, 512, 513, 514 abdomen-side waist stretchable elastic    member-   520 back-side waist stretchable elastic member-   530 waist gather-   540 first curved part-   541 first abdomen-side curved part-   542 first back-side curved part-   600, 601, 602, 603, 604, 605, 6000 leakproof sheet stretchable    elastic member-   610 contraction force fixing part-   620 abdomen-side contraction force fixing part-   630 back-side contraction force fixing part-   640 third curved part-   700 erected section-   710 abdomen-side erected section-   720 back-side erected section-   730 crotch-side erected section-   740 erection sheet-   800, 8000 leakproof sheet-   810 folded part-   820 leakproof wall-   830 leakproof sheet fixed part-   840 leakproof gather-   850 excrement storage space-   900, 9000 fastening region-   910 liquid-permeable sheet-   920 liquid-resistant sheet-   930 outer sheet-   D1 diaper longitudinal length-   D2 measured length-   F1 contraction force of the leg stretchable elastic member-   F2 contraction force of the waist stretchable elastic member-   F3 contraction force acting on the contraction force intersecting    region-   X diaper transverse direction-   Y diaper longitudinal direction-   α pet-   α1 leg of pet-   α2 back of pet-   α3 abdomen of pet

1. A disposable diaper for pets comprising: a back-side waist area, anabdomen-side waist area and a crotch area between the back-side waistarea and the abdomen-side waist area, a flap formed in the abdomen-sidewaist area and having an end on the back side, a diaper longitudinaldirection in which the back-side waist area, the crotch area and theabdomen-side waist area contiguously extend when the disposable diaperis not worn by a pet, and a diaper transverse direction crossing thediaper longitudinal direction, both ends in the diaper longitudinaldirection, and both ends in the diaper transverse direction, a diaperlongitudinal center line extending in the diaper longitudinal directionand passing through a center of the disposable diaper in the diapertransverse direction, a diaper center point which bisects the diaperlongitudinal center line on the disposable diaper, a tail insertionopening formed in a prescribed region in the diaper longitudinaldirection, an absorbent core formed on one side of the tail insertionopening in the diaper longitudinal direction and disposed in aprescribed region extending over the crotch area and the abdomen-sidewaist area, a fastening part having a prescribed length and provided onthe flap, a fastening part longitudinal direction in which the length ofthe fastening part extends and a fastening part transverse directioncrossing the fastening part longitudinal direction, a fastening partmidpoint which bisects a length of the fastening part in the fasteningpart transverse direction on a boundary between the fastening part andthe flap, a fastening region provided in the back-side waist area andconfigured to receive the fastening part, and a shortest line pointlocated on the diaper longitudinal center line at a shorteststraight-line distance from the fastening part midpoint to the diaperlongitudinal center line via the back-side end of the flap, wherein: theshortest line point is located on an abdomen-side waist area side beyondthe diaper center point, when the disposable diaper is put on the pet,the crotch area and the abdomen-side waist area cover a crotch and anabdomen of the pet, while the back-side waist area is closely fitted toa back of the pet, and the fastening part is fastened to the fasteningregion, and the weight of the absorbent core after excretion is receivedin the longitudinal direction of the fastening part while the disposablediaper is worn by the pet.
 2. The disposable diaper as defined in claim1, wherein a straight-line distance between the shortest line point anda diaper end center point at which the end in the diaper longitudinaldirection in the abdomen-side waist area and the diaper longitudinalcenter line intersect is 170 to 250 mm.
 3. The disposable diaper asdefined in claim 1, wherein a ratio of a straight-line distance betweenthe shortest line point and the diaper end center point at which the endin the diaper longitudinal direction in the abdomen-side waist area andthe diaper longitudinal center line intersect, to a straight-linedistance between the abdomen-side end and the back-side end on thediaper longitudinal center line is 45.5 to 50.0%.